2 * PC Speaker beeper driver for Linux
4 * Copyright (c) 2002 Vojtech Pavlik
5 * Copyright (c) 1992 Orest Zborowski
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/i8253.h>
18 #include <linux/input.h>
19 #include <linux/platform_device.h>
20 #include <linux/timex.h>
23 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
24 MODULE_DESCRIPTION("PC Speaker beeper driver");
25 MODULE_LICENSE("GPL");
26 MODULE_ALIAS("platform:pcspkr");
28 static int pcspkr_event(struct input_dev *dev, unsigned int type,
29 unsigned int code, int value)
31 unsigned int count = 0;
47 if (value > 20 && value < 32767)
48 count = PIT_TICK_RATE / value;
50 raw_spin_lock_irqsave(&i8253_lock, flags);
53 /* set command for counter 2, 2 byte write */
55 /* select desired HZ */
56 outb_p(count & 0xff, 0x42);
57 outb((count >> 8) & 0xff, 0x42);
58 /* enable counter 2 */
59 outb_p(inb_p(0x61) | 3, 0x61);
61 /* disable counter 2 */
62 outb(inb_p(0x61) & 0xFC, 0x61);
65 raw_spin_unlock_irqrestore(&i8253_lock, flags);
70 static int pcspkr_probe(struct platform_device *dev)
72 struct input_dev *pcspkr_dev;
75 pcspkr_dev = input_allocate_device();
79 pcspkr_dev->name = "PC Speaker";
80 pcspkr_dev->phys = "isa0061/input0";
81 pcspkr_dev->id.bustype = BUS_ISA;
82 pcspkr_dev->id.vendor = 0x001f;
83 pcspkr_dev->id.product = 0x0001;
84 pcspkr_dev->id.version = 0x0100;
85 pcspkr_dev->dev.parent = &dev->dev;
87 pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
88 pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
89 pcspkr_dev->event = pcspkr_event;
91 err = input_register_device(pcspkr_dev);
93 input_free_device(pcspkr_dev);
97 platform_set_drvdata(dev, pcspkr_dev);
102 static int pcspkr_remove(struct platform_device *dev)
104 struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
106 input_unregister_device(pcspkr_dev);
107 /* turn off the speaker */
108 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
113 static int pcspkr_suspend(struct device *dev)
115 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
120 static void pcspkr_shutdown(struct platform_device *dev)
122 /* turn off the speaker */
123 pcspkr_event(NULL, EV_SND, SND_BELL, 0);
126 static const struct dev_pm_ops pcspkr_pm_ops = {
127 .suspend = pcspkr_suspend,
130 static struct platform_driver pcspkr_platform_driver = {
133 .pm = &pcspkr_pm_ops,
135 .probe = pcspkr_probe,
136 .remove = pcspkr_remove,
137 .shutdown = pcspkr_shutdown,
139 module_platform_driver(pcspkr_platform_driver);